#include<iostream>
#include<fstream>
using namespace std;

int cmmdc (int a, int b)
{
	int r;
	while(b!=0)
	{
		r=a%b;
		a=b;
		b=r;
	}
	if(a!=1)
		return 0;
	return 1;
}
int main()
{
	ifstream f("fractii.in");
	ofstream g("fractii.out");
	
	int n,p,q,cont=0,i,j;
	
	f>>n;
	
	for(i=1;i<=n;i++)
		for(j=1;j<=n;j++)
			if(cmmdc(i,j))
				cont++;
	g<<cont;
	
	return 0;
}